Stimulated emission and relaxation processes in molecular crystals

Eremenko, V. V.; Ogurtsova, L. A.

doi:10.1016/0370-1573(88)90115-9

Cited by 3 publications

(1 citation statement)

References 92 publications

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“…Among the large number of polycyclic aromatic hydrocarbons, anthracene (C 14 H 10 ), trans-stilbene (C 14 H 12 ) and naphthalene (C 10 H 8 ) have only three or two aromatic rings. They have been studied and utilized as organic scintillators [82][83][84][85][86][87] in the optical wavelengths. Therefore, they are well understood organic crystals with developed fabrication methods and laboratory measurement data.…”

Section: Polycyclic Aromatic Hydrocarbonsmentioning

confidence: 99%

Light Dark Matter Detection with Hydrogen-rich Crystals and Low-Tc TES Detectors

Wang,

Chang,

Lisovenko

et al. 2022

Preprint

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Direct detection of nuclear scatterings of sub-GeV Dark Matter (DM) particles favors low-Z nuclei. Hydrogen nucleus, which has a single proton, provides the best kinematic match to a light dark matter particle. The characteristic nuclear recoil energy is boosted by a factor of a few tens from those for larger nuclei used in traditional Weakly Interacting Massive Particle (WIMP) searches. Furthermore, hydrogen is optimal not only for spin-independent nuclear scattering of a sub-GeV DM, but also for spin-dependent nuclear scatterings, where large parameter space remains unconstrained yet. In this paper, we first introduce hydrogen-rich crystals, which emit two classes of signals under kinetic excitations. One class of the signals is infrared photons, which are from optically active fundamental vibrational modes of molecules and at several characteristic wavelengths. Another is acoustic phonons, and optical phonons that decay into acoustic phonons. We then discuss the technical status and future researches of low-Tc Transition-Edge Sensor (TES) detectors, which measure single infrared photons and a small flux of acoustic phonons with desirable sensitivities. With theoretical modeling to select hydrogen-rich crystals for the optimized science reach, ultra-sensitive low-Tc TES detectors for readout, and experimental prototyping of a light DM detection scheme, a detection experiment can be built for measuring the large unexplored parameter space of light DM particles.

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Section: Polycyclic Aromatic Hydrocarbonsmentioning

confidence: 99%

Light Dark Matter Detection with Hydrogen-rich Crystals and Low-Tc TES Detectors

Wang,

Chang,

Lisovenko

et al. 2022

Preprint

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Light Dark Matter Detection with Hydrogen-Rich Targets and Low-$$T_c$$ TES Detectors

et al. 2022

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Stimulated emission from vacuum-deposited thin films of a substituted oligo(p-phenylene vinylene)

Brouwer

Krasnikov

Pham

et al. 1998

Applied Physics Letters

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The influence of the morphology on the light emission properties of vacuum-deposited polycrystalline oligo(p-phenylene vinylene) thin films under intense laser excitation was studied. The morphology of the thin films was varied by annealing just below the first melting point (crystal-mesophase transition) and by crystallization from the isotropic melt. Amplified spontaneous emission occurred within the individual domains and was only observed when the domain size was increased by thermal treatment. The amplified spontaneous emission threshold for the melt-crystallized thin films was found to be comparable to that for conjugated polymer thin films.

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Stimulated emission and relaxation processes in molecular crystals

Cited by 3 publications

References 92 publications

Light Dark Matter Detection with Hydrogen-rich Crystals and Low-Tc TES Detectors

Light Dark Matter Detection with Hydrogen-rich Crystals and Low-Tc TES Detectors

Light Dark Matter Detection with Hydrogen-Rich Targets and Low-$$T_c$$ TES Detectors

Stimulated emission from vacuum-deposited thin films of a substituted oligo(p-phenylene vinylene)

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